Double-action toggle-press.



0. SMITH. DOUBLE ACTION TOGGLE PRESS. APPLICATION TILED SEPT. 29, 1908968,608., Patented Aug. 30, 1910.

n 23 Iii 73 7 a 18 uiiu 7 ii;

I Witnesses am/4:04p,

OBIElItll'aIIbT SMITH, OF BRIDGETON, NEW JERSEY.

DOUBLE-ACTION TOGG-LE-PRESS.

Specification of Letters Patent.

Patented Aug. 30, 1910.

Application filed September 29, 1908. Serial No. 455,348.

To all whom it may concern:

Be it known that I, OBERLIN SMITH, of Bridgeton, in the county ofCumberland and in the State of New Jersey, have invented a certain newand useful Improvement in Double-Action Toggle-Presses, and

do hereby declare that the following is a full, clear, and exactdescription thereof.

Double action presses, which are presses having two rams, one of whichmoves through the other, are in respect to the rammoving mechanism oftwo general types, the outer ram in one type being moved by cams, and inthe other type being moved by toggles. As between the two types, thetoggle is preferable to the cams, as the ram-moving means, because withthe cams the shaft is subjected to unnecessary pressure after thedescent of the ram has been completed.

My invention therefore relates to the toggle type, and my object hasbeen to improve the double action toggle press by simplifying theconstruction thereof in respect to the number of parts, and the mode ofoperating the press, the elimination of any side pressure upon thetoggles after the same have been straightened for the completion of thedescent of the ram, and yet the maintenance of the latter in anabsolutely rigid condition in its wholly lowered and holding position,and the elimination of want of reliability or uncertainty in action dueto the springiness and torsion of the members of the ram-operatingmechanism, and to these ends my invention consists in the double actionpress constructed substantially as hereinafter specified and claimed.

In the accompanying drawings, Figure 1 is a perspective view of a doubleaction toggle press embodying my invention, both rams being shown in araised position; and Fig. 2 a detail view showing a different form of mytoggle mechanism.

In the embodiment of my invention which I have selected for illustrationin the drawings, the press in its general features is of usualconstruction, it comprising a bolstersupporting bed 10, from which risecolumns 11 and posts or rods 11 that at their upper ends are connectedby a truss beam 12, and there are an inner ram 13 and an outer ram 1 1,the inner ram being connected to a horizontal crank shaft 15, so that bythe revolution of said shaft the inner ram is reciprocated vertically toand from the work on the bolster, the shaft being revolved by gearingreceiving motion from a suitable driving shaft. The outer ram ischambered or hollow for the passage through it of the inner ram, and inthe instance illustrated in the drawings it has sliding bearings on thecolumns 11 to guide it in its vertical movements. The outer ram neareach of its four corners has pivotally connected to it the lower end ofone of the links or members 16 of a toggle, the upper end of whose othermember 16 is pivotally connected to the truss beam 12, the pivotalconnections of the toggle with the ram and truss beam being in the samevertical line or plane.

The toggles when flexed or bent have their knuckles extending inward oraway from the sides of the press, which is their position when the innerram is ascending and is completely raised. It will be seen that I hangor suspend the outer ram from the truss beam, or a stationary part ofthe press, by means of the sets of toggles so .that under the influenceof gravity, the

outer ram tends downward and will move downward, sliding along the guideposts or columns, but to force the outer ram downward if need be, and aswell supply the power necessary to move it into its final andwork-holding position, I provide preferably for each toggle an offset orprojection on the side of the inner ram, so located and arranged that asthe inner ram descends, said offset or projection will engage the toggleknuckle on the inner side, and traveling over the same will force itoutward, and thereby straighten the toggle. I preferably make the offsetor projection in the form of a roller 17 to reduce or ease the friction,although if preferred, the toggle joint or knuckle may be provided witha roller, and the ofiset or projection will be in the form of astationary lug. In order to open or break the toggle to release theouter ram and permit its ascent, I provide a similar offset orprojection also in the form of a roller 18, if a roller 17 be used forthe other offset or projection, so situated and arranged as to engage ashoulder or projection 19 at the toggle joint or knuckle that projectsoutwardly toward the side of the press when the inner ram is movedupward. The continued ascent or lifting of the outer ram after thebreaking of the toggle, and its partial lifting as a result of theaction of the roller 18 upon the toggle projection 19, may be effectedor produced by providing on the outer ram one or more vertical studs orposts 20 each of which passes through an eye or opening in a horizontallug or boss 21. on both the front and back sides of the inner ram ifneed be, above which lug or boss, and adapted to be engaged by the topthereof when the inner ram ascends, is a shoulder on the stud or postthat may be in the form of a nut 22 screwed thereon. It will be evidentthat by this connection between the two rams, the inner ram may have alimited extent of vertical movement independently of the outer ram. I

It will be seen that by my invention I use virtually but a singleoperating mechanism to reciprocate both rams, and I thus not onlygreatly simplify the machine, but I secure greater certainty orreliability of action of the outer ram, for I eliminate the torsionwhich is consequent upon the use of a long shaft as a part of the outerram reciprocating mechanism, and since the toggle-engaging offsets orprojections are on the solid body which composes the inner ram, anyderangement due to springiness of the press members is avoided; and whenthe toggles are straightened they are subjected to no lateral orsidewise pressure, so that any exertion of power or pressure at thistime is obviated and yet the inner ram is held down with absoluterigidity.

A very important feature of my invention is the ability to construct apress originally as a single action press, that is, a press with asingle ram, and then convert it into a double action press merely byadding to it the outer ram, the toggles and the toggle-engaging offsetsor projections, it being necessary for the latter purpose merely toprovide the inner ram with horizontal holes for the reception of therods or shafts 23 which form the journals for the rollers 17 and 18 whenthe toggleengaging offsets or projections are in the form of rollers.

It is to be understood that the particular press shown in the drawingsand described in detail herein, is merely one embodiment of myinvention, and that my invention may be embodied in a press differing inparticular construction from that shown and described. It is to beunderstood of course that any number of toggles may be employed, anynumber employed being conveniently possible because each toggle isoperated independently of the other.

To illustrate a different construction that may be made embodying myinvention, I invite attention to Fig. 2 of the drawings, in which,instead of employing two projections or rollers 17 and 18, a singleprojection or roller correspondingto the roller 17 may be employed forboth pushing the toggles into a straightened out position at the end ofthe ram stroke and releasing them at the beginning of the ascent, theupper toggle link being provided with a curved arm or tail a thatprojects laterally and downward in position to be engaged by the roller17 when it ascends.

Having thus described my invention, what I claim is 1. A press having aframe comprising a horizontal truss beam at the top, two reciprocatingrams, toggle mechanism acting upon one ram, said toggle mechanism beingsuspended from the truss beam, and means carried by the other ram foracting upon said toggle mechanism.

2. A press having two reciprocating rams, a plurality of independenttoggles connected with one of the rams, and an independenttoggle-engaging means for each toggle.

3. A press having two reciprocating rams, a plurality of togglesconnected with one of the rams, and an independent toggle-sir gagingmeans for each toggle carried by the other ram.

4. A press having two reciprocating rams, toggles connected at one endwith one of the rams, a support for the other end of the toggles, andmeans carried by the other ram that alternately engage the toggles inthe reciprocations of the ram.

5. A press having two reciprocating rams, toggles connected at one endto one of the rams, a support for the other ends of the toggles, meanscarried by the other ram for straightening the toggles and for flexingthe same, and a loose connection between the rams, whereby one is movedby the other when the toggles have been flexed.

6. A press having two reciprocating rams, toggle mechanism acting uponone ram, and parts mounted directly upon the body of the other ram andmoving therewith for acting upon said toggle mechanism.

A press having two reciprocating rams, toggle mechanism acting upon oneram, parts mounted directly upon the body of the other ram and movingtherewith for acting upon said toggle mechanism, and a loose connectionbetween said rams through which movement of one ram by the other in onedirection is effected.

8. A press having two reciprocating rams, toggle" mechanism acting uponone ram, parts mounted directly upon the body of the eeeeos 3 other ramand moving therewith for acting I In testimony that T claim theforegoing upon szud toggle mechanism, and a loose I have hereunto set myhand.

connection between said rams through which movement of one ram by theother OBERLIN SMITH in one direction is efiected, said means com-Witnesses:

prising a bolt on one ram having a head or F. O. SOMERVILLE,enlargement, and an eye on the other ram. C. C. NOBLES.

